CN109639361A - A kind of signal decoding method, communication terminal and the device with store function - Google Patents
A kind of signal decoding method, communication terminal and the device with store function Download PDFInfo
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- CN109639361A CN109639361A CN201811572354.8A CN201811572354A CN109639361A CN 109639361 A CN109639361 A CN 109639361A CN 201811572354 A CN201811572354 A CN 201811572354A CN 109639361 A CN109639361 A CN 109639361A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/508—Pulse generation, e.g. generation of solitons
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
Abstract
The invention discloses a kind of signal decoding method, communication terminal and with the device of store function.The signal decoding method includes: received encoded signal, wherein encoded signal includes at least one subsignal；Odd-times sampling is carried out at least partly a subsignal in encoded signal respectively, corresponding first digital signal of encoded signal is obtained according to sampled result, wherein odd number is greater than one；First digital signal is decoded, original signal is obtained.By the above-mentioned means, the present invention can reduce the decoded bit error rate.
Description
Technical field
The present invention relates to the communications fields, more particularly to a kind of signal decoding method, communication terminal and have store function
Device.
Background technique
For the signal using 4PPM (pulse-phase modulation, pulse position modulation) scheme code, generally
The decoding process used receives the level of the segment pulse thus of level point among the every segment pulse of signal to choose, and is sent into subsequent solution
Code module is decoded.
For present applicant during actually realizing that 4PPM is decoded, discovery uses non-dedicated infrared receiving/transmission chip
When, because of environmental disturbances, the signal that receiving end receives be not it is especially desirable in the case where (such as burr insufficient pulsewidth in), it is original
Scheme will appear the larger bit error rate.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of signal decoding method, communication terminal and there is store function
Device, can reduce the decoded bit error rate.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of signal decoding method is provided, is wrapped
It includes: received encoded signal, wherein the encoded signal includes at least one subsignal；To at least portion in the encoded signal
Divide a subsignal to carry out odd-times sampling respectively, corresponding first number of the encoded signal is obtained according to the sampled result and is believed
Number, wherein the odd number is greater than 1；First digital signal is decoded, original signal is obtained.
Wherein, the period of the sampling is the one of the even number point of the duration of the subsignal；And/or the sampling of the sampling
Point does not include the starting point and/or terminal of the subsignal.
Wherein, the even number is greater than or equal to 4.
Wherein, at least partly a subsignal in the encoded signal carries out odd-times sampling respectively, comprising: right
Each subsignal in the encoded signal carries out odd-times sampling respectively, obtains the odd number feature of each subsignal
Value；The result according to the sampling obtains corresponding first digital signal of the encoded signal, comprising: to each son
The odd number characteristic value of signal carries out majority decision, and show that each subsignal is corresponding according to the result of the majority decision
The second digital signal；The encoded signal corresponding first is obtained based on corresponding second digital signal of each subsignal
Digital signal.
Wherein, the odd number characteristic value to the subsignal carries out majority decision, comprising: according to preset different special
The different weighted values of value indicative calculate the sum of identical described weighted value of characteristic value in the odd number characteristic value of the subsignal, and
Based on described in calculating and carry out majority decision.
Wherein, the corresponding weighted value highest of characteristic value that the middle of each subsignal samples；And/or often
A subsignal is successively decreased from centre to the corresponding weighted value of characteristic value that the corresponding sampling in two sides obtains.
Wherein, the encoded signal is the pulse signal obtained by pulse position modulation, and the subsignal is pulse signal
In a cross-talk pulse signal.
Wherein, at least partly a subsignal in the encoded signal carries out odd-times sampling respectively, according to institute
The step of sampled result obtains the encoded signal corresponding first digital signal is stated to be realized by field programmable gate array.
In order to solve the above technical problems, another technical solution used in the present invention is: providing a kind of communication terminal, wrap
Include: processor, memory and telecommunication circuit, the processor couple the memory and the telecommunication circuit；Wherein, described to deposit
Reservoir is for storing program instruction；The processor and the telecommunication circuit are used to execute the program instruction of the memory storage
To realize the coding/decoding method for being directed to pulse signal as described above.
In order to solve the above technical problems, another technical solution used in the present invention is: providing a kind of with store function
Device, be stored with program instruction, described program instruction can be performed to realize the solution for being directed to pulse signal as described above
Code method.
The beneficial effects of the present invention are: being in contrast to the prior art, the encoded signal that the present invention is received in decoding
When, odd-times sampling is carried out to the subsignal of encoded signal, it is possible to prevente effectively from since unitary sampling is easy by influence of noise
And decoding error is caused, to effectively reduce decoded bit error rate.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the flow diagram of the first embodiment of signal decoding method provided by the invention；
Fig. 2 is the waveform diagram of encoded signal provided by the invention；
Fig. 3 is to obtain corresponding first numerical value of encoded signal according to sampled result in signal decoding method provided by the invention
The flow diagram of the embodiment of the step of signal；
Fig. 4 is the schematic illustration of the first embodiment of signal decoding method neutron signal sampling provided by the invention；
Fig. 5 is the schematic illustration of the second embodiment of signal decoding method neutron signal sampling provided by the invention；
Fig. 6 is the schematic illustration of the 3rd embodiment of signal decoding method neutron signal sampling provided by the invention；
Fig. 7 is the structural schematic diagram of an embodiment of communication terminal provided by the invention；
Fig. 8 is the structural schematic diagram of an embodiment of the device provided by the invention with store function.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of the application protection.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Referring to Fig. 1, Fig. 1 is the flow diagram of the first embodiment of signal decoding method provided by the invention.This hair
The signal decoding method of bright offer includes:
S101: received encoded signal, wherein the encoded signal includes at least one subsignal.
In a specific implement scene, received encoded signal is decoded, which includes at least one son
Signal.In this implement scene, which is by for 4PPM (pulse-phase modulation, pulse position modulation)
The pulse signal that scheme is encoded, subsignal are the cross-talk pulse signal in the pulse signal.
In the object of IrDA (Infrared Data Association, infrared data tissue) infrared light communication standard agreement
It manages in layer specification and agreement, the communication modes for having a kind of communication speed to be 4MHz are referred to as IrDA FIR (Fast
Infrared, fast infrared agreement), i.e. fast infrared optical communication.The coding and decoding scheme that this communication modes uses is 4PPM
(pulse-phase modulation, pulse position modulation) scheme.The general principles of this scheme are as follows: by a data flow every two
Position data form the signal of one big section pulse, then big section pulse signal is divided into four sub- pulse signals, four subpulses
The impulse level of pulse signal is consistent in each segment of signal, then indicates former with the level combinations in each big section pulse signal
The combination of beginning data flow.Specifically, referring to Fig. 2, Fig. 2 is the waveform diagram of encoded signal provided by the invention.Such as Fig. 2 institute
Show, encoded signal 10 is one big section pulse signal in encoded signal, including four subsignals 11,12,13 and 14, four sons
Signal is four sub- pulse signals, and the level combinations in encoded signal 10 can be used to indicate that original data stream combines.In this reality
The pulse length for applying four subsignals of this in scene is consistent, in other implement scenes, the pulse length of this four subsignals
It may be inconsistent.
It, can also be using other pulse modulation schemes, for example, impulse modulation mainly has pulse in other implement scenes
Amplitude modulation (Pulse Amplitude Modulation, PAM), pulse strength modulation (Pulse Intensity Modulation,
PIM), pulse frequency modulated (Pulse frequency modulation, PFM) etc..
S102: odd-times sampling is carried out at least partly a subsignal in the encoded signal respectively, is adopted according to described
Sample result obtains corresponding first digital signal of the encoded signal.
In a specific implement scene, odd-times sampling is carried out at least partly a subsignal in encoded signal,
The odd number is odd number greater than 1, such as 3,5,7,9 etc..It is specifically adopted because only 1 sampling of sub-signal progress can be potentially encountered
The sampled point of sample is exactly the part with noise, so as to cause sampled result inaccuracy, improves the bit error rate.Therefore, right
Subsignal carries out most samplings, it is possible to prevente effectively from the problem of sampled result inaccuracy.
Since the beginning and end of subsignal is the changed turning point of impulse level, the starting point of signal and end
The probability that error occurs in the level of point is very high, therefore in this implement scene, sampled point does not include the beginning and end of subsignal,
In order to avoid collecting the signal of mistake, the bit error rate is caused to increase.
In this implement scene, sampled point is evenly distributed in the pulse of subsignal, and the period of sampling is the subsignal
The one of the even number of duration point.For example, the pulse duration of subsignal is t, then the period sampled is t/4, t/6, t/8 etc..The idol
Number minimum 4, it is only remaining because three sampled points of sampling eliminate the beginning and end of subsignal when the sampling period is t/2
The sampled point of subsignal midpoint, only a sampled point are not able to satisfy the demand of the required multiple sampled points of the present invention.
In this implement scene, a corresponding characteristic value can be obtained in each sampling, this feature value is this sampling
Numerical value representated by the level of the sampled point obtained.For example, if the level value of certain sampled point once sampled is high level,
The numerical value represented is 1, then the characteristic value that this sampling obtains is 1.If the level value of the sampled point of the secondary sampling is low level,
The numerical value represented is 0, then the characteristic value that this sampling obtains is 0.The numerical value of the level representative of sampled point can arbitrarily be arranged or
Modification.
After sub-signal carries out most samplings, multiple characteristic values of the subsignal are obtained.To these multiple characteristic values
Majority decision is carried out, in order to avoid being to represent the number of the sampled point of different numerical value equal out, and can not obtain knot in judgement
By the case where, in this implement scene, sub-signal carry out odd-times sampling.In other implement scenes, hits can also be with
For even number.
In this implement scene, since sampling number is excessively high, at least partly a subsignal in encoded signal respectively into
The sampling of row odd-times, the step of obtaining encoded signal corresponding first digital signal according to sampled result, is by FPGA (Field-
Programmable Gate Array, field-programmable gate array) column realization.
The process of corresponding first numerical signal of encoded signal is obtained according to sampled result particularly with regard in the present embodiment, it can
To be to obtain corresponding first number of encoded signal according to sampled result in signal decoding method provided by the invention refering to Fig. 3, Fig. 3
The flow diagram of the embodiment of the step of value signal.To the son in encoded signal in signal decoding method provided by the invention
Signal carries out the step of odd-times sampling, comprising:
S301: majority decision is carried out to the odd number characteristic value of each subsignal, and according to the majority decision
As a result corresponding second digital signal of each subsignal is obtained.
In a specific implement scene, after sub-signal carries out odd-times sampling, odd number characteristic value is obtained,
Majority decision is carried out to the odd number characteristic value, as calculates the number of different characteristic value, with the more characteristic value of number, as
This sampling as a result, be corresponding second digital signal of the subsignal.
Fig. 4 is please referred to, Fig. 4 is the first embodiment of signal decoding method neutron signal sampling provided by the invention
Schematic illustration.In this implement scene, 0,1 two characteristic value, if sampling samples the pulse of subsignal in a certain sampled point
Level be high level, then the characteristic value of the sampled point be 1, if being in the level that a certain sampled point samples the pulse of subsignal
Low level, then the characteristic value of the sampled point is 0.The period of sampling is the one of four several points of the duration of the subsignal.Therefore at this
In implement scene, sub-signal 13 carries out 3 samplings.3 sampled points 21,22 and 23 sample obtained characteristic value be respectively 1,0,
1, therefore characteristic value 1 has 2, characteristic value 0 has 1, and 2 are greater than 1, and using majority decision method, being as a result characterized value is 1.Therefore, sub
Corresponding second digital signal of signal 13 is 1.In this implement scene, number of the number of characteristic value 1 only than characteristic value 0 is more
1, the two gap is smaller, and therefore, if there is error in statistics or calculating, the probability that may cause misjudgment is higher.
Referring to Fig. 5, Fig. 5 is the schematic illustration of the second embodiment of subsignal sampling provided by the invention.In Fig. 5
In, 7 samplings are carried out to pulse 13, the result of the sampling of seven sampled points 31,32,33,34,35,36,37 is respectively 1,1,1,
0,1,1,1.Therefore characteristic value 1 has 6, and characteristic value 0 has 1, the number of characteristic value 1 than characteristic value 0 number more than 5, the two
Gap is larger, even if a possibility that error occur, influencing judging result is relatively low.Therefore, comparison diagram 4 and Fig. 5 are it is found that sampling
Number is more, and obtained result is more accurate.
Referring to Fig. 6, Fig. 6 is the schematic illustration of the 3rd embodiment of subsignal sampling provided by the invention.In Fig. 5
In, 9 samplings are carried out to pulse 13, the result of the sampling of 9 sampled points 41,42,43,44,45,46,47,48,49 is respectively
0,1,1,1,0,1,1,1,0.Therefore characteristic value 1 has 6, and characteristic value 0 has 3, even if due to the short of width and noise of pulse
Influence, lead to have in 9 samplings three times that sampled result is 0, but the gap between 6 and 3 is larger, even if there is error,
A possibility that influencing judging result is relatively low.Therefore, comparison diagram 4, Fig. 5 and Fig. 6 are it is found that sampling number is more, obtained knot
Fruit is more accurate.
In another specific implement scene, different weighted values is set to different characteristic values, calculates subsignal
The sum of identical weighted value of characteristic value in odd number characteristic value carries out majority decision based on the sum of the weighted value.
For example, different weighted values is assigned respectively to 7 sampled points in Fig. 5, due to subsignal please continue to refer to Fig. 5
The stability of pulse beginning and end is lower, and the probability for error occur is higher, and the centre of the pulse of subsignal be disturbed it is general
Rate is lower, and therefore, theoretically, the accuracy of the result of the pulse intermediate samples of subsignal is higher.So in this implement scene
In, the corresponding weighted value highest of the characteristic value that subsignal middle samples, and each weighted value is successively decreased from centre to two sides.Example
Such as, the weighted value of 7 sampled points is respectively 1,2,3,4,3,2,1 in Fig. 5.And it samples for 7 times of Fig. 5 neutron signal 13 and to obtain
Characteristic value is 1,1,1,0,1,1,1.The weighted value of characteristic value 0 and be 4, the weighted value of characteristic value 1 and be 1+2+3+3+2+1=
12,12 are greater than 4, and using majority decision method, being as a result characterized value is 1.Therefore, corresponding second digital signal of subsignal 13 is 1,
Judging result is correct.
In another implement scene, the weighted value of 7 sampled points is respectively 1,1,1,7,1,1,1 in Fig. 5, characteristic value 0
Weighted value and be 7, the weighted value of characteristic value 1 and be 1+1+1+1+1+1=6,7 are greater than 6, and the result of majority decision is 0, judgement
The result is that mistake.If the weighted value of 7 sampled points is adjusted to 1,1,1,3,1,1,1, the weighted value of characteristic value 0 and be 3, feature
The weighted value of value 1 and be 1+1+1+1+1+1=6,6 are greater than 3, and the result of majority decision is 1, correct judgment.Or 7 are sampled
The weighted value of point is adjusted to 1,3,5,7,5,3,1, the weighted value of characteristic value 0 and be 7, the weighted value of characteristic value 1 and be 1+3+5+5
+ 3+1=16,16 are greater than 7, and the result of majority decision is 1, correct judgment.
In another example the weighted value of 9 sampled points is respectively 1,2,3,4,5,4,3,2,1 in Fig. 6 please continue to refer to Fig. 6.And
The result of the sampling of 9 sampled points 41,42,43,44,45,46,47,48,49 is respectively 0,1,1,1,0,1,1,1,0 in Fig. 6.
Therefore characteristic value 1 has 6, and characteristic value 0 has 3, the weighted value of characteristic value 0 and be 1+5+1=7, the weighted value of characteristic value 1 and is
2+3+4+4+3+2=18,18 are greater than 7, and using majority decision method, being as a result characterized value is 1.Therefore, subsignal 13 corresponding
Two digital signal is 1.
In another implement scene, the weighted value of 9 sampled points 41,42,43,44,45,46,47,48,49 point in Fig. 6
Not Wei 1,1,1,1,7,1,1,1,1, the weighted value of characteristic value 0 and be 1+7+1=9, the weighted value of characteristic value 1 and be 1+1+1+1+
1+1=6,9 are greater than 6, and the result of majority decision is 0, and judging result is mistake.If the weighted value of 7 sampled points is adjusted to 1,
1,1,1,3,1,1,1,1, the weighted value of characteristic value 0 and be 1+3+1=5, the weighted value of characteristic value 1 and be 1+1+1+1+1+1=
6,6 are greater than 5, and the result of majority decision is 1, correct judgment.Or the weighted value of 7 sampled points is adjusted to 1,2,3,4,7,4,
3,2,1, the weighted value of characteristic value 0 and be 1+7+1=9, the weighted value of characteristic value 1 and be 2+3+4+4+3+2=18,18 be greater than 9,
The result of majority decision is 1, correct judgment.
It follows that the sampled point gap of sampled point and two sides is excessive, therefore it is as described in the examples to pay the utmost attention to one
The assignment method to successively decrease from centre to two sides, and the adjacent direct weighted value gap of sampled point can not be excessive, can have in this way
Effect avoids error in judgement.
S302: corresponding first number of the encoded signal is obtained based on corresponding second digital signal of each subsignal
Word signal.
In a specific implement scene, using 4PPM (pulse-phase modulation, pulse position modulation)
Scheme is as encoding scheme, one big section pulse code signal, including four subsignals.Side described in step S301 is respectively adopted
Method obtains corresponding second digital signal of four subsignals, which is combined in order, obtain this one
Corresponding first digital signal of section pulse code signal greatly.For example, four subsignals 11 of encoded signal 10 shown in Fig. 2,12,
13 and 14 corresponding second digital signals are 0,0,1,0, then corresponding first digital signal of encoded signal 10 is 0010.
In other implement scenes, received encoded signal includes multiple big section of pulse signal, can be respectively according to these
Corresponding second digital signal of section pulse signal greatly, is combined into corresponding first digital signal of the encoded signal, or can be straight
It connects according to corresponding second digital signal of each subsignal in the encoded signal, is combined into the first number letter of the encoded signal
Number.
S103: first digital signal is decoded, original signal is obtained.
In a specific implement scene, after obtaining the first digital signal of the encoded signal, to first number
Signal is decoded.Using 4PPM (pulse-phase modulation, pulse position modulation) scheme as encoding scheme, because
This, can be original signal and the 4PPM encoded signal table of comparisons refering to table 1, table 1.
1 original signal of table and the 4PPM encoded signal table of comparisons
| Data Bit Pair(DBP) | 4PPM Data Symbol(DD) |
| 00 | 1000 |
| 01 | 0100 |
| 10 | 0010 |
| 11 | 0001 |
In other implement scenes, decoded method of tabling look-up method known to those skilled in the art, herein no longer into
Row repeats.
As can be seen from the above description, odd-times sampling is carried out to the subsignal of the encoded signal received in the present embodiment,
And majority decision is carried out to the characteristic value that sampling obtains, it is possible to prevente effectively from being caused due to unitary sampling by noise jamming
Decoding error, so that the bit error rate be effectively reduced.
Referring to Fig. 7, Fig. 7 is the structural schematic diagram of an embodiment of communication terminal provided by the invention.Communication terminal 10
Including processor 11, memory 12, telecommunication circuit 13, processor 11 couples memory 12, telecommunication circuit 13.Memory 12 is used for
Store program instruction.Processor 11 combines telecommunication circuit 13 for the program instruction in run memory 12 to be communicated and be held
The following method of row.
13 received encoded signal of telecommunication circuit of communication terminal 10, the encoded signal include at least one subsignal, communication
The processor 11 of terminal 10 carries out odd-times sampling at least partly a subsignal in encoded signal respectively, which is greater than 1,
And corresponding first digital signal of encoded signal is obtained according to sampled result.Processor 11 is decoded the first digital signal,
Obtain original signal.
As can be seen from the above description, communication terminal is solved in the subsignal to the encoded signal received in the present embodiment
When code, sub-signal carries out odd-times sampling, can effectively avoid being easy due to unitary sampling by noise jamming, to cause
Decoding error, the bit error rate can be effectively reduced.
Referring to Fig. 8, Fig. 8 is the structural schematic diagram of an embodiment of the device provided by the invention with store function.
At least one program instruction 21 is stored in device 20 with store function, program instruction 21 is for executing such as Fig. 1 and Fig. 3 institute
The method shown.In one embodiment, it is single to can be storage in the processor chips piece in equipment for the device with store function
The tool of member, storage chip, hard disk either other read-write storages such as mobile hard disk or flash disk, CD, can also be clothes
Business device etc..
As can be seen from the above description, the program instruction stored in the Installation practice with store function in the present embodiment
It can be used for decoding the encoded signal received, odd-times carried out at least partly a subsignal in encoded signal respectively and is adopted
Sample obtains corresponding first digital signal of encoded signal according to sampled result, is decoded, obtains original to the first digital signal
Signal.Can to avoid as unitary sampling and by noise jamming and caused by decoding error, so that the bit error rate be effectively reduced.
It is different from the prior art and unitary sampling is carried out to the subsignal of encoded signal, to be easy to be made by noise jamming
At decoding error, the present invention carries out odd-times sampling to the subsignal of encoded signal, it is possible to prevente effectively from since noise jamming is made
At decoding error, so that the bit error rate be effectively reduced.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of signal decoding method characterized by comprising
Received encoded signal, wherein the encoded signal includes at least one subsignal；
Odd-times sampling is carried out at least partly a subsignal in the encoded signal respectively, is obtained according to the sampled result
Corresponding first digital signal of the encoded signal, wherein the odd number is greater than one；
First digital signal is decoded, original signal is obtained.
2. the method according to claim 1, wherein the period of the sampling is the idol of the duration of the subsignal
The one of several points；And/or
The sampled point of the sampling does not include the starting point and/or terminal of the subsignal.
3. according to the method described in claim 2, it is characterized in that, the even number is greater than or equal to 4.
4. the method according to claim 1, wherein at least partly height in the encoded signal is believed
Odd-times sampling is carried out number respectively, comprising:
Odd-times sampling is carried out to each subsignal in the encoded signal respectively, obtains the odd number of each subsignal
Characteristic value；
The result according to the sampling obtains corresponding first digital signal of the encoded signal
Majority decision is carried out to the odd number characteristic value of each subsignal, and is obtained often according to the result of the majority decision
Corresponding second digital signal of a subsignal obtains corresponding first digital signal of the encoded signal.
5. according to the method described in claim 4, it is characterized in that, the odd number characteristic value to the subsignal carries out greatly
Number judgement, comprising:
According to the different weighted values of preset different characteristic value, it is identical to calculate characteristic value in the odd number characteristic value of the subsignal
The sum of the weighted value, and give the described of calculating and carry out majority decision.
6. according to the method described in claim 5, it is characterized in that,
The corresponding weighted value highest of the characteristic value that the middle of each subsignal samples；And/or each sub- letter
Number successively decreased from centre to the corresponding weighted value of characteristic value that the corresponding sampling in two sides obtains.
7. the method according to claim 1, wherein
The encoded signal is the pulse signal encoded by pulse position modulation, and the subsignal is one in pulse signal
Cross-talk pulse signal.
8. the method according to claim 1, wherein
At least partly a subsignal in the encoded signal carries out odd-times sampling respectively, according to the sampled result
The step of obtaining the encoded signal corresponding first digital signal is realized by field programmable gate array.
9. a kind of communication terminal characterized by comprising processor, memory and telecommunication circuit, described in processor coupling
Memory and the telecommunication circuit；
Wherein, the memory is for storing program instruction；
The processor and the telecommunication circuit are used to execute the program instruction of the memory storage to realize such as claim
The described in any item signal decoding methods of 1-8.
10. a kind of device with store function, which is characterized in that be stored with program instruction, described program instruction can be held
Row is to realize such as the described in any item signal decoding methods of claim 1-8.
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